Of or relating to the metacarpus and the phalanges of the hand, especially to the articulations between them.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Examples from the Web for metacarpophalangeal
Historical Examples of metacarpophalangeal
The first is still shorter, not reaching the metacarpophalangeal articulation of the second.